diff --git a/package-lock.json b/package-lock.json
index f24239c..16c050d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "coffeescript": "^2.5.1"
       },
       "devDependencies": {
-        "grunt": "~1.4.1",
+        "grunt": "~1.5.3",
         "grunt-contrib-coffee": "~2.1.0",
         "grunt-contrib-watch": "~1.1.0",
         "grunt-manifest": "~0.4.4",
@@ -954,9 +954,9 @@
       "dev": true
     },
     "node_modules/grunt": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.4.1.tgz",
-      "integrity": "sha512-ZXIYXTsAVrA7sM+jZxjQdrBOAg7DyMUplOMhTaspMRExei+fD0BTwdWXnn0W5SXqhb/Q/nlkzXclSi3IH55PIA==",
+      "version": "1.5.3",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.3.tgz",
+      "integrity": "sha512-mKwmo4X2d8/4c/BmcOETHek675uOqw0RuA/zy12jaspWqvTp4+ZeQF1W+OTpcbncnaBsfbQJ6l0l4j+Sn/GmaQ==",
       "dev": true,
       "dependencies": {
         "dateformat": "~3.0.3",
@@ -964,7 +964,7 @@
         "exit": "~0.1.2",
         "findup-sync": "~0.3.0",
         "glob": "~7.1.6",
-        "grunt-cli": "~1.4.2",
+        "grunt-cli": "~1.4.3",
         "grunt-known-options": "~2.0.0",
         "grunt-legacy-log": "~3.0.0",
         "grunt-legacy-util": "~2.0.1",
@@ -3400,9 +3400,9 @@
       "dev": true
     },
     "grunt": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.4.1.tgz",
-      "integrity": "sha512-ZXIYXTsAVrA7sM+jZxjQdrBOAg7DyMUplOMhTaspMRExei+fD0BTwdWXnn0W5SXqhb/Q/nlkzXclSi3IH55PIA==",
+      "version": "1.5.3",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.3.tgz",
+      "integrity": "sha512-mKwmo4X2d8/4c/BmcOETHek675uOqw0RuA/zy12jaspWqvTp4+ZeQF1W+OTpcbncnaBsfbQJ6l0l4j+Sn/GmaQ==",
       "dev": true,
       "requires": {
         "dateformat": "~3.0.3",
@@ -3410,7 +3410,7 @@
         "exit": "~0.1.2",
         "findup-sync": "~0.3.0",
         "glob": "~7.1.6",
-        "grunt-cli": "~1.4.2",
+        "grunt-cli": "~1.4.3",
         "grunt-known-options": "~2.0.0",
         "grunt-legacy-log": "~3.0.0",
         "grunt-legacy-util": "~2.0.1",
diff --git a/package.json b/package.json
index 11789af..25d2b44 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "license": "Apache",
   "private": false,
   "devDependencies": {
-    "grunt": "~1.4.1",
+    "grunt": "~1.5.3",
     "grunt-contrib-coffee": "~2.1.0",
     "grunt-contrib-watch": "~1.1.0",
     "grunt-manifest": "~0.4.4",